The Tropical rainforest has three different layers caused by the dense vegetation. These layers are the canopy, the under-story, and the ground layer. The under-story keeps sunlight from reaching the ground. Because of this, very little vegetation is able to grow on the ground.
In order for the plants to survive, they have to be able to adapt or reach some sunlight. When seeds fall to the ground, they usually aren't able to grow because of the lack of sunlight, but when seeds land on tree branches, they send a long root to the ground so that they can get the sunlight they need, along with the water and other nutrients. As the plant grows, branches and leaves grow, creating a canopy from the host tree, eventually killing it.
Some different plants are: The Kirks Purple, Concorde, David Boulin, Fifth Dimension, and the Rum Runner.
Tropical rainforests can be found in South America, Central America, and Africa.